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Re: Floating rotors ??? (archive)
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Posted by Rob K. on May 08, 2000 at 11:11:49:

In Reply to: Re: Floating rotors ??? posted by CarlT on May 08, 2000 at 08:30:40:

: Next time you walk by a newer sportsbike, take a look at the front rotors. You will notice that the rotors are bolted onto the hub through bushings instead of being on solid piece. This gives the rotor the freedom of expanding and contracting (hence the name floating) under extreme heat without warping as a solid/normal rotor would.

: Floating rotors are normally not needed, but come in handy on a racetrack. BMW had this as a part of their Nurburgring suspension option for the M5/M3.

: Most calipers are floating (I think...:) )

: Carl


Actually, most calipers are not floating. A floating caliper (or pad guided caliper) is not actually bolted to a mounting bracket. A fixed caliper is bolted in place and slides on its mounting bolts as it squeezes the pads on the rotor. A floating caliper is held in place by the pads and a couple of pins that keep the whole assembly on the car. The caliper doesn't move in relation to the rotor.


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